MODELING THE LA PALMA LANDSLIDE TSUNAMI
MODELING THE LA PALMA LANDSLIDE TSUNAMI
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拉帕尔马滑坡海啸建模
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
C. Mader
中科院分区：
文献类型：
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作者：
C. Mader
对加那利群岛拉帕尔马岛上的 Cumbre Vieja火山侧面崩塌可能引发的海啸进行了建模。根据瑞士苏黎世联邦理工学院弗里茨的物理建模研究预测，对于“最坏情况”的山体滑坡，其侧翼崩塌被模拟为一个高650米、半径20公里的水波，在传播30公里后形成。建模使用了求解非线性长波方程的SWAN代码。海啸的产生和传播是使用一个由600×640个单元组成的10分钟墨卡托网格进行建模的。山体滑坡源可能引发的海啸波长和周期较短，导致其为一种中间波而非浅水海啸波。仅使用浅水模型只能描述波的几何扩散，而不能描述这种短周期波会表现出的显著弥散现象。弥散会使波幅减小到浅水波幅的三分之一以下。
The tsunami expected from a lateral collapse of the Cumbre Vieja Volcano on La Palma in the Canary Islands was modeled. The flank collapse for a ‘worst case” landslide was modeled as a 650 meter high, 20 kilometer radius water wave after 30 kilometers of travel as predicted by physical modeling studies of Fritz at ETH in Zurich, Switzerland. The modeling was performed using the SWAN code which solves the nonlinear long waver equations. The tsunami generation and propagation was modeled using a 10 minute Mercator grid of 600 by 640 cells. The small wavelength and period of the tsunami expected from the landslide source results in an intermediate wave rather than a shallow water tsunami wave. The use of a shallow water model only describes the geometric spreasing of the wave and not the significant dispersion such a short period wave would exhibit. Dispersion would reduce the wave amplitudes to less than one-third of the shallow water amplitudes.